Means for constructing hollow concrete walls



G. J. ENGERT MEANS FOR CONSTRUCTING HOLLOW CONCRETE WALLS.

APPLICATIOQ FILED FEB. 6, I922.

Patented Nov. 28, 1922. 2 SHEETS-SHEET l- G. J. ENGERT'.

MEANS FOR CONSTRUCTING HOLLOW CONCRETE WALLS.

APPLICATION FILED m. 6, 1922.

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Patented Nov. 28, 1922 I 1,437,297 Er OFFER;

.MEANS FOR CONSTRUCTING I-IOLLOW CONCRETE WALLSQ Application'filed February 6, 1922. Serial no. 534,605:

1'0 all whom it may 00920617: j I Be it known tl1at T,Gnonen JQENennn a citizen of the United States,-resid1ng at Spokane,' in the county of Spokane and State ofl VashingtOn, have invented certain new and useful Improvements in Means for Constructing:Hollow Concrete Walls, of

which the following is a specification.

of hollow concrete walls and has for its objectthe provision of means whereby sucha wall may be constructedexpeditiously. and inexpensively, the finished structure possessing all the necessarystrength. The in-' vention contemplates the provision of a wall.

. which will possess-thestrength of a solid wall and will contain' 'an air chamber which may be a dead-air chamber to'avoid the presence. of moisture and transmission of sound or mayprovide circulation through the entire height of the wall to ipe'rmit foul air to escape through itbeneath the'rool of the building. The invention is illustratcd in the accompanying drawings and resides in certain novel features which will be hereinafter first'fully described! and then more particularly pointed out in the appended claims. i

In the drawings- 'Figure l is a perspective view showing a;

-partly completed wall with my appliances in operative position;

g- 2 is a il perspective view ofthe core or form whereby the air chamber s produced in the Wall; a

' Fig. 3 is an enlarged plan r iewof a sup porting and reinforcing plate which is employed in the construction of the 'walland which is embodied in the finished structure; Fig. 4 is a detail perspective view: of a fastening which is employed in the practice of my invention. j In constructing a wall according to my in- .vention, I employ inner and outer falsework or forms 1 which, asshown, COl'iSlSt of stud-f ding 2 and planks or boards'sec'ured to the studding so as to present a trough or hollow space between their opposed faces, the height of the falsework being increased as the work progresses. At intervals corresponding to .the courses'of the wall, tension'wires 3 are secured aroundthe studding and extend through the planks or boards and are connected between the boards, as indicated at 4;, these tension wires serving to prevent outward fcollapseor which air may circulate in will effectively resist the pressure the concrete exerted against them. These, spreaders' maybe PTOVldGCl'lD any desired spreading ofthe 'falsework. The foundation of the building may 'be'a solid strucl ertical reinforcing rods 5 are embedded in the foundation and rise therefrom at suitable intervals to extend to the height to This invention relates to the construction which it is desired to carry the wall. The

upper surface of the foundation will; of

rods '5. Along theside edges of this base plate (3, I provide openings 7 in which are" secured tie wires-8 which are wrapped about and secured to the vertical reinforcing rods so as to hold the base plate firmly in position. -Substantially Ll-shaped slits are formed in the base plate, thereby producing tongues 9 which may be struck up from the slits, as shown clearly in F 1g. '1, the

spaces originally occupied by the several tongues producing openings. 10 through the completed wall The base plate'h'aving been secured in position,the form or core-1-l is placed upon the base plate so as-to rest thereon between the upstanding tongues and be held in position upon the plate by said tongues. This core "or form is preferably a ,inetallic plate substantiallyfill-shaped in cross section having its base 12 ofsufficient width to rest upon thebase plate snugly between opposed tongues 9 and having its sides 15 extending to any convenient height, ordl narilly about eighteen inches. The form'is preferably constructed of resilient metal tempered so that the side members 13 thereof tend to spring tow'ard'each other at their upper edges. After the form has. been placed uponthe base plate 6,-spreaders 1a are inserted between the sides of the form so as to maintain them in a spread-apart position and reinforce vthem'so that number at intervals along the length of the form or they may be coextensive with the form so as to completely fill the same. As

shown in Fig, 2, they may be of less height than the form thereby leaving the upper I place edges of the form free to be compressed and receive the cover 1n the event that the spreaders may be badly swollen from the effects of the water used in mixing the conits side edges which engage the outer faces of the s1demembers13 of the form. @bviously, the cap or cover 15 prevents the entrance of the poured concrete into the form so that all of the concrete will be deposited at the sides of the form and between the same and the falsework. The upper surface of the cap is smooth so that any concrete which may fall thereon may be readily scraped off and deposited in the space between the cap and the falsework. I also provide a holder consisting ofa cross bar 17 which is equal in length to the distance between the opposed planks or boards of the outer forms or falsework, this holder being provided near its ends with openings 18 through which the vertical reinforcing rods 5 may pass. The ends of the bar 17 are turned up, as shown at 19, and are T-shaped so as to provide a somewhat extended bearing against the falsework, openings 20 being formed through the heads of the upturned T-shaped ends to permit nails or similar fastenings to be driven therethrough into the falsework. Un theunderside of the bar 1?, midway the ends thereof,is a bracket or spaced depending lugs 21 which are adapted to engage the outer surfaces of the flanges lfi and thereby prevent lateral displacement of the cap 15 and the form. It will be readily understood that the bar 17 is mounted slidably upon the vertical reinforcing rods 5 and is moved downwardly on said rods so that it will bear firmly upon the cap 15, as clearlyshown in Fig. 1.

The several parts having been secured in position as described, green concrete is poured into the space betwen the opposed V sides of the falsework and directed into the spaces between said falsework and the respective sides of the form, the pouring being continued until the level of the poured concrete reaches the edges of the cap. The concrete is then permitted to partly set and when it has set suiiiciently to permit movement of the form, the fastenings by which the T-shaped ends of the holder are secured to the falseworl; are withdrawn and the holder is slid upwardly upon the vertical reinforcing rods. The cap 15 is then removed. sitter which the spreaders 14.- are withdrawn from the form 11. he the spreaders are withdrawn, the side members of the form will spring toward each other and free themselves from the partly set concrete, whereupon the form may be lifted to a point above the partly finished wall. A second base plate 6 is then placed in position over the partly finished wall and the described operation is repeated until the wall has reached the desired height, each successive base plate 6 being leftembedded in the wall and constituting a reinforcement therefor. After the wall is finished, the falsework is, of course, removed and the projecting ends of the tension wires 3 are cutoffflush with the surfaces of the wall. At proper intervals, removable cores may be placed inposition in openings provided therefor in the falsework so that sockets to receive joists, indicated at 22, will be produced and in the same manner openings may be formed through the inner member of the wall to establish communication between the chamber of the wall and the spaces between the ceilings and floors of the building so as to permit foul air from the rooms to escape. Thedescribed operation may be carried to the extreme top of the wall so that the opening produced by the use of the form 11 will terminate immediately at the roof, but the extreme upper end of the wall may be formed solid, if preferred, and the last placed base plate (5 may have openings formed therein to communicate with pipes or tubes rising from the base plate through the roof of the building.

It will be readily understood from the foregoing description, taken in connection with the accompanying drawings, that T have devised means whereby a hollow concrete wall may be rapidly produced and a strong structure obtained at a low cost. The forms and the other parts may be provided in standard lengths and when. a number of them are required to provide for the die sired length of awall, the'ends of the base plates may overlap and the ends of the forms may be telescoped so that a continuous outer. surface will be presented for the proper forming of the poured concrete. Moreover, the overlapping or telescoping may be made deeper or shallower as circumstances may require so that door and window openings may be very readily formed in the wall as the same is finished. The, baseplates may be shipped with the tongues 9 in a flat condition so that a large number of the plates may be piled one upon another within a relatively small space, thus facilitating transportation and reducing storage demands. In like manner, the several forms may be nested for transportation and storage so thatthe several parts may be easily transported from one point of use to an.- ot-her point of use.

Having thus described the invention, what is claimed as new is:

1. Means for forming hollow concrete walls comprising base plates adapted to be embedded in the wall, hollow open-top forms adapted to rest upon the said base plates, covers for said forms, and means extending across the covers for holding the covers and the forms in place.

2. Means for forming a hollow concrete wall comprising a baseplate adapted to be embedded in the wall, a form resting upon the base plate and having resilient sides tending normally to approach, means on the base plate for preventing lateral movement of the from, spreaders adapted to fit within the form, and means acting upon the top of the form to cover the same and to hold it to the base plate.

8. Means for forming hollow concrete walls comprising a base plate adapted to be embedded in the wall, a form adapted to rest upon the base plate and having resilient sides tending normally to approach each other, spreaders adapted to be inserted within the form to maintain the sides thereof in aspread condition, a cover for the form, and a holder adapted to bear upon said cover and be fixed upon the same.

4. In the construction of hollow concrete Walls, the combination of falseworlr between which the wall is to be produced, vertical reinforcing rods disposed within the space between the members of the falseworlr, base plates to be embedded in the wall, means for securing said plates to the vertical reinforcing rods, forms adapted to rest upon the base plates, means for preventing lateral displacement of the forms, covers for the forms, and holding bars slidably engaged upon the vertical reinforcing rods and bear ing upon the covers for the forms and having their ends detachably secured to the falsework.

5. In the construction of hollow concrete walls, the combination of outer forms, ver tical reinforcing rods erected between said forms, base plates to be embedded in the wall, means for connecting said base plates to the vertical reinforcing rods, forms adapted to rest upon the base plates between the reinforcing rods, means for pre venting lateral displacement of the forms, covers for the forms, and holding bars slidably engaged upon the vertical reinforcing rods and provided on their under sides with depending lugs engaging the edges of the covers, the ends of said holding bars being upturned and adapted to be detachably secured t the outer forms.

6, Means for forming hollow concrete walls comprising base plates to be embedded in the wall, forms adapted to rest upon the base plates and having resilient sides tending normally to approach, and means for holding the forms in place.

7 In the construction of hollow concrete walls, the combination of outer forms, vertical reinforcing rods erected between said forms, base plates to be embedded in the wall, forms to rest upon the base plates between the reinforcing rods, and holding bars slidably mounted on the reinforcing rods and provided 011 their under sides with spaced projections to engage the inner forms, the ends of said bars being detachably secured to the outer forms.

In testimony whereof I affix my signature.

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